//
// Created by YANHAI on 2019/5/20.
//

#include <stdio.h>

extern int va;

extern int getG(void);

extern int getO(void);

int main(void)
{
    printf("va=%d\n", va);
    printf("getO=%d\n", getO());
    printf("getG=%d\n", getG());
    printf("%d", va * getO() * getG());
}